Portable support platform



FIG. 1 is a perspective view of a portable support platform showing mynew design, a portion of a polish rod of the well and the pumper beingshown in phantom for illustrative purposes only and forms no part of theclaimed design;

FIG. 2 is an elevational view of one side thereof;

FIG. 3 is an elevational view of an opposite side thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is an elevational view of one end thereof; and

FIG. 7 is an elevational view of an opposite end thereof.

The ornamental design for a portable support platform, as shown anddescribed.